orpiment

American  

[awr-puh-muhnt] / ˈɔr pə mənt /

noun

1. a mineral, arsenic trisulfide, As 2 S 3 , found usually in soft, yellow, foliated masses, used as a pigment.

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orpiment British  

/ ˈɔːpɪmənt /

noun

1. a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As 2 S 3

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Etymology

Origin of orpiment

1350–1400; Middle English < Old French < Latin auripigmentum pigment of gold; see auri- ¹, pigment

Example Sentences

I stuck my head inside a cabinet to get a close look at the rocks of the arsenic sulfides realgar and orpiment, blazes of flame orange locked within the crystals.

From The New Yorker • Aug. 27, 2018

He thought of himself as a reformer—manufacturing fresh reds, greens, and yellows to replace older, toxic pigments like cinnabar and orpiment.

From The New Yorker • Aug. 27, 2018

Then José Arcadio Buendía threw three doubloons into a pan and fused them with copper filings, orpiment, brimstone, and lead.

From "One Hundred Years of Solitude" by Gabriel Garcia Marquez

There is also a flux which separates sulphur, orpiment and realgar from metalliferous ore.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius

He made some twice with iron, and three times with orpiment.

From The Phantom World or, The philosophy of spirits, apparitions, &c, &c. by Christmas, Henry